[clang] [llvm] Enable fexec-charset option (PR #138895)

[Hubert Tong via llvm-commits]

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@@ -1751,6 +1766,7 @@ CharLiteralParser::CharLiteralParser(const char *begin, const char *end,
   HadError = false;
 
   Kind = kind;
+  LiteralConverter *LiteralConv = &PP.getLiteralConverter();
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hubert-reinterpretcast wrote:

This can be a reference. `getLiteralConverter()` returns a reference.

https://github.com/llvm/llvm-project/pull/138895